I need a program to find out the signe of a number (equal =0,>or <0) using switche statements

Question

If number >0 show positif
If number <0 show negative
else zero( using switch statement )

Answer 1

Or I have an idea:
int num /= Math.abs(num);
switch(num){
case 1:
...Positive
Break;
case -1:
....Negative
Break;
Default:
Null
}

Answer 2

So you need to find wich number is negative, or positive, then you want to calculate the signe of the current number?

Answer 3

The switch is not good in this case, but if you want with switch...(in java):

int num = 1;
switch(num<0){
case true:
System.out.println("It is negative");
break;
case false:
switch(num==0){
case true:
System.out.println("the number is 0");
break;
case false:
System.out.println("the number is positive");
break;
}
break;
}

Answer 4

With tarnary operator is much easier:
int num = 1;
System.out.println("The number is "+num<0?"negative":num==0?"0":"positvie);

Answer 5

import java.util.Scanner;

public class EXO5METHODE2 {

public static void main(String[] args) {

double nbr;

Scanner entree = new Scanner(System.in);

System.out.println("Entrez un nombre entier relatif : ");

nbr=entree.nextDouble();

switch (nbr<0) {

case true:

System.out.println("le nombre que vous avez entré est negative !");

break;

case false:

switch(nbr==0) {

case false:

System.out.println("le nombre que vous avez entré est nul !");

break;

default:

System.out.println("le nombre que vous avez entré est positif !");

clavier.close();

} }}}

Answer 6

I try but the program doesn't work !

Answer 7

What is the output? Or what is the error message?

Answer 8

Exception in thread "main" java.lang.Error: Unresolved compilation problems:

Cannot switch on a value of type boolean. Only convertible int values, strings or enum variables are permitted

Cannot switch on a value of type boolean. Only convertible int values, strings or enum variables are permitted

clavier cannot be resolved

at EXO5METHODE2.main(EXO5METHODE2.java:8)

Answer 9

Because in switch method cannot add boolean as parameter, so you cant solve this with switch, because the boolean has only 2 value, true and false

Answer 10

Try solve with tarnary operator, or with a simple if method, anyway nobody prefered switch method, because switch has jumping instuction, and the jumping instruction is not the safest thing

Answer 11

I use your idea (nbr/math.abs(nbr)) for switch method and thanks for helping